On the lower right side of my toddler's neck there is a small pea size "lump" or bulge in the vein. I noticed it several months ago and was going to wait for his next check up to discuss with his dr but that isn't for a few months and I don't know if this needs more immediate attention. It does not cause him any pain, and it's only visible when he is crying or turns his head a certain way and is only on the right side.